I also do so knowing that I actually don't know everything about the esoterica that is roundel usage and run an added risk of being ridiculed by those whose life work is the study of seemingly insignificant details.
The aircraft depicted here would have operated from Naval Air Station Great Yarmouth in the summer of 1915.
Counter clockwise from upper right: 1: A typical French Cockade of the 18th and 19th centuries was made from tricoloured ribbon to mimic the French Republic flag; 2: A French soldier's cap from the 19th century, known as a “shako”, sporting a cockade; 3: Next, we see the original Cockade worn by French military aircraft during the early part of the First World War; 4: Finally, the British, who originally used a Union Flag on the fuselages and wings of their military aircraft, decided to copy the French, but reverse the order of the colours. George's Cross in the middle of the Union Flag or “Jack”, was being misidentified as a German Iron Cross, then in use as an identifier of the enemy's aircraft.
Coming in line with an ally's, and not an opponent's, markings was thought to be wise.
Photo via Steven Bradley, illustration via Mikhail Bykov @ Wings Palette There was a short period immediately after the adoption of the French-style cockade to identify Royal Flying Corps aircraft, when both devices were employed – in the case of this recently downed Royal Aircraft Factory B.
E.2c of 12 Squadron, Royal Flying Corps, it was roundels on the fuselage and Union Jacks under the wings.